Access the session directly from DepContext.

Cargo.lock

@@ -4203,6 +4203,7 @@ dependencies = [
  "rustc_index",
  "rustc_macros",
  "rustc_serialize",
+ "rustc_session",
  "rustc_span",
  "smallvec 1.6.1",
  "tracing",

compiler/rustc_middle/src/dep_graph/mod.rs

@@ -2,6 +2,7 @@ use crate::ich::StableHashingContext;
 use crate::ty::{self, TyCtxt};
 use rustc_data_structures::profiling::SelfProfilerRef;
 use rustc_data_structures::sync::Lock;
+use rustc_session::Session;
 
 #[macro_use]
 mod dep_node;
@@ -101,20 +102,18 @@ impl<'tcx> DepContext for TyCtxt<'tcx> {
         TyCtxt::create_stable_hashing_context(*self)
     }
 
-    fn debug_dep_tasks(&self) -> bool {
-        self.sess.opts.debugging_opts.dep_tasks
-    }
-    fn debug_dep_node(&self) -> bool {
-        self.sess.opts.debugging_opts.incremental_info
-            || self.sess.opts.debugging_opts.query_dep_graph
-    }
-
     #[inline]
     fn dep_graph(&self) -> &DepGraph {
         &self.dep_graph
     }
 
+    #[inline(always)]
     fn profiler(&self) -> &SelfProfilerRef {
         &self.prof
     }
+
+    #[inline(always)]
+    fn sess(&self) -> &Session {
+        self.sess
+    }
 }

compiler/rustc_query_impl/src/plumbing.rs

@@ -47,13 +47,6 @@ impl HasDepContext for QueryCtxt<'tcx> {
 impl QueryContext for QueryCtxt<'tcx> {
     type Query = Query<'tcx>;
 
-    fn incremental_verify_ich(&self) -> bool {
-        self.sess.opts.debugging_opts.incremental_verify_ich
-    }
-    fn verbose(&self) -> bool {
-        self.sess.verbose()
-    }
-
     fn def_path_str(&self, def_id: DefId) -> String {
         self.tcx.def_path_str(def_id)
     }
@@ -132,14 +125,6 @@ impl QueryContext for QueryCtxt<'tcx> {
         (cb.force_from_dep_node)(*self, dep_node)
     }
 
-    fn has_errors_or_delayed_span_bugs(&self) -> bool {
-        self.sess.has_errors_or_delayed_span_bugs()
-    }
-
-    fn diagnostic(&self) -> &rustc_errors::Handler {
-        self.sess.diagnostic()
-    }
-
     // Interactions with on_disk_cache
     fn load_diagnostics(&self, prev_dep_node_index: SerializedDepNodeIndex) -> Vec<Diagnostic> {
         self.on_disk_cache

compiler/rustc_query_system/Cargo.toml

@@ -16,6 +16,7 @@ rustc_errors = { path = "../rustc_errors" }
 rustc_macros = { path = "../rustc_macros" }
 rustc_index = { path = "../rustc_index" }
 rustc_serialize = { path = "../rustc_serialize" }
+rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 parking_lot = "0.11"
 smallvec = { version = "1.6.1", features = ["union", "may_dangle"] }

compiler/rustc_query_system/src/dep_graph/dep_node.rs

@@ -87,7 +87,10 @@ impl<K: DepKind> DepNode<K> {
 
         #[cfg(debug_assertions)]
         {
-            if !kind.can_reconstruct_query_key() && tcx.debug_dep_node() {
+            if !kind.can_reconstruct_query_key()
+                && (tcx.sess().opts.debugging_opts.incremental_info
+                    || tcx.sess().opts.debugging_opts.query_dep_graph)
+            {
                 tcx.dep_graph().register_dep_node_debug_str(dep_node, || arg.to_debug_str(tcx));
             }
         }

compiler/rustc_query_system/src/dep_graph/graph.rs

@@ -280,7 +280,7 @@ impl<K: DepKind> DepGraph<K> {
             let mut hcx = dcx.create_stable_hashing_context();
             let current_fingerprint = hash_result(&mut hcx, &result);
 
-            let print_status = cfg!(debug_assertions) && dcx.debug_dep_tasks();
+            let print_status = cfg!(debug_assertions) && dcx.sess().opts.debugging_opts.dep_tasks;
 
             // Intern the new `DepNode`.
             let dep_node_index = if let Some(prev_index) = data.previous.node_to_index_opt(&key) {
@@ -731,7 +731,7 @@ impl<K: DepKind> DepGraph<K> {
                                 return None;
                             }
                             None => {
-                                if !tcx.has_errors_or_delayed_span_bugs() {
+                                if !tcx.dep_context().sess().has_errors_or_delayed_span_bugs() {
                                     panic!(
                                         "try_mark_previous_green() - Forcing the DepNode \
                                           should have set its color"
@@ -835,7 +835,7 @@ impl<K: DepKind> DepGraph<K> {
             // Promote the previous diagnostics to the current session.
             tcx.store_diagnostics(dep_node_index, diagnostics.clone().into());
 
-            let handle = tcx.diagnostic();
+            let handle = tcx.dep_context().sess().diagnostic();
 
             for diagnostic in diagnostics {
                 handle.emit_diagnostic(&diagnostic);

compiler/rustc_query_system/src/dep_graph/mod.rs

@@ -13,6 +13,7 @@ pub use serialized::{SerializedDepGraph, SerializedDepNodeIndex};
 
 use rustc_data_structures::profiling::SelfProfilerRef;
 use rustc_data_structures::sync::Lock;
+use rustc_session::Session;
 
 use std::fmt;
 use std::hash::Hash;
@@ -24,9 +25,6 @@ pub trait DepContext: Copy {
     /// Create a hashing context for hashing new results.
     fn create_stable_hashing_context(&self) -> Self::StableHashingContext;
 
-    fn debug_dep_tasks(&self) -> bool;
-    fn debug_dep_node(&self) -> bool;
-
     /// Access the DepGraph.
     fn dep_graph(&self) -> &DepGraph<Self::DepKind>;
 
@@ -34,6 +32,9 @@ pub trait DepContext: Copy {
 
     /// Access the profiler.
     fn profiler(&self) -> &SelfProfilerRef;
+
+    /// Access the compiler session.
+    fn sess(&self) -> &Session;
 }
 
 pub trait HasDepContext: Copy {

compiler/rustc_query_system/src/query/mod.rs

@@ -26,9 +26,6 @@ use rustc_span::def_id::DefId;
 pub trait QueryContext: HasDepContext {
     type Query: Clone + HashStable<Self::StableHashingContext>;
 
-    fn incremental_verify_ich(&self) -> bool;
-    fn verbose(&self) -> bool;
-
     /// Get string representation from DefPath.
     fn def_path_str(&self, def_id: DefId) -> String;
 
@@ -43,12 +40,6 @@ pub trait QueryContext: HasDepContext {
     /// Try to force a dep node to execute and see if it's green.
     fn try_force_from_dep_node(&self, dep_node: &DepNode<Self::DepKind>) -> bool;
 
-    /// Return whether the current session is tainted by errors.
-    fn has_errors_or_delayed_span_bugs(&self) -> bool;
-
-    /// Return the diagnostic handler.
-    fn diagnostic(&self) -> &rustc_errors::Handler;
-
     /// Load diagnostics associated to the node in the previous session.
     fn load_diagnostics(&self, prev_dep_node_index: SerializedDepNodeIndex) -> Vec<Diagnostic>;
 

compiler/rustc_query_system/src/query/plumbing.rs

@@ -550,7 +550,7 @@ where
 
     // If `-Zincremental-verify-ich` is specified, re-hash results from
     // the cache and make sure that they have the expected fingerprint.
-    if unlikely!(tcx.incremental_verify_ich()) {
+    if unlikely!(tcx.dep_context().sess().opts.debugging_opts.incremental_verify_ich) {
         incremental_verify_ich(*tcx.dep_context(), &result, dep_node, dep_node_index, query);
     }